The M16 Short Nylon buttstock looks aggressive, and has a massive amount of storage inside for big batteries. Swapping your battery over couldn't be easier with a built in door at the rear of the buttstock pad, and there is even a built in sling mount!
Most V2 style receivers
1 x M16 Short Nylon Buttstock for Gel Blaster (Black)
1 x Screw for securing to spring retainer